Improvement in telegraph sounders



D. E. SWEET. TELEGRAPH-SOUNDERS.

Pateg ted Sept. 1a, 1 77,

INVENTOR ATTORNEYS WITNESSES N-PETERS, PHOTO-UTHQGHAPHER. WASHINGTON, D C.

l Specification formiz1 gof; Letters Patent .To l whoma m y merni z v l i I ,Beitknow-n thathpnnmr.Enwnnnswnnr,

tn -fl i een, i the, c n y 9 0 0k. a sfi e. of Illinois, have invented ,oer-tain new and,

andul do hereby declare that the following 'is a f ylea an i qt de pt on; the of, which will :enablepthers ski-lled in jalie sameire ence being-1 h d. t t e ccomp ying; drawings,,--an,d to the. v letters of, reference sw I T;oiidnlcmo. ILLINOIS- m" LEfiRAE'H SOUNDERS.

o. 195,4l7, dated September 18, 1 8773 application filed February 1,1817.

useful I p o em nts n.. e eg ap u; ders;.

art to which it appertains to makeianduse the marked thereon, which" form a part ;of this pec fic ne "The object" of device by which the faint click. -0f the.-'armature of the Morserelay will be increased and, re-enforced, so as to give-a clear,,distinct sound, which can be easily heard, even if the relay is attached to a long circuit with a feeble current, thus making it unnecessary to use a local battery.

My invention is intended to be attached to the common Morse relay, or to any receiving or sending instrument that is ordinarily read by the sound.

It consists of a device which greatly magnifies the short movement of the armature, and of an improved sounder, for augmenting the click of the instrument.

Figure 1 is a perspective view Of a Morse relay-instrument with my attachment. Fig. 2 is a side view of part of the armature and hammer, showing the details of their construction.

In the drawings, m is the ordinary lever, which carries the armature, and plays between the screw-pins n and o. A lever, b, which 1 will call the hammer, is placed vertically above m, and in line with it when in its normal position. This hammer is pivoted to the sliding support d, and dis fastened by the binding-screw e to the slotted support f. This allows a vertical adjustment to the fulcrum of the hammer.

The screw-pin n passes through a hole in the slotted plate f below the slot, and the binding-screw p clamps and holds the slotted plate. These parts f, d, andb may be attached in like manner to the screw-pin 0. It is immaterial which support is used. The short arm b of the hammer b (shown in detail by ifi'y iirveiition is to furnish a Fig. 2)is made with a wedged-shaped end, which sets in a V-shaped notch in the end of the ear-mature m. This makes a simple con- 7 nection with very little friction but any other device may be used for the same purpose.

. The upper end of. b carries a small hammerhead, 0, and the ratio between the length of thearms b and b is such that the head 0 has from i'ou-rto six times the amount of play that the armature at has between the points ntand o. I find this gives the best result,

though the ratio may be varied as desired. The hammer-head cis not, however, an essential feature.

The hammer-head c is placed between two screw-pins, t and j, similar in construction to m and 0, which limit the motion of the lever or armature m in the common instrument.

With this attachment the pins n and o are set so that the hammer-head a will play in contact with the points 0' and 7', and not be stopped before it strikes them, by the armature m striking the points at and 0. The pins iandj are adjustable, and screwed through the hoop it, which is fastened to the head of the sounder 'r s. The sounder is made in two partsthe head 8, which is called the gongsection, made with a projecting rim which slides over the funnel portion 1' of the sounder, and the funnel r, a short tube, so curved as to make the planes of the cross-sections at its two extremities at right angles to each other, and made with a broad flaring opening, so as throw the sound out into the room.

The bend in the tube is not essential, but as the instrument is generally placed it brings the opening into the most convenient position for the operator.

To adjust the pin j the funnel portion r of the sounder can be removed, and then the heads of the screw j, which come inside of the gongsection .9, can be reached. The gong-section s has a slide, it, with clamp-screw, which slides on the standard 12. The standard 12 is screwed to the bed-piece of the instrument, and supports the sounder r s, as described. The sounder r s can be made to fasten to the relay by screw-pin n or o.

The sounder is made of any sonorous material which will transmit and augment the sounds produced by the hammer 0 on the points i and j. For this purpose thin wood or porcelain Rfor the head of the gong-section, and metal, glass, porcelain, or hard rubber for the rest of the sounder, will possibly give the clearest and loudest sounds. The ham merhead 0 will strike at both ends of its stroke when the pins 03 j and n o are set as described. If it is desired, the pin 0 may be set clear of armature m and allow the back stroke to strike against screw-pin i of the sounder, or screw-pins n and 0 can both be set clear of armature m, and allow both the forward and back stroke to strike points i and j of the sounder. This cannot be done at all times, depending upon the length of the wire, the amount of play that can be allowed between points a and 0, or the amount of attraction in the magnet.

I am aware thatsounders in which the blows are struck upon the head of a barrel-shaped chamber have been used before, but those only reflect the vibrations of the head of the sounder to a focus, while in my device the click, augmented by the sounder, is thrown out through the flaring mouth as the sound issues from a trumpet.

Futhermore, the armature in all other instruments acts directly upon the sounder. The movement of the armature is small and the blow light, while with my extension or compound leverage the hammer has a much larger and stronger movement, and makes a clear, distinct click, which, acting through the sounder, is perfectly audible withbut the aid of a local battery.

What I claim as my invention, and desire to secure by Letters Patent, is-

1. The ham mer b, constructed and supported substantially as described, in combination with the armature m and pins '5 and j, the whole constructed. for the purpose of enlarging the movement of the striking parts of a telegraphic instrument, substantially as described.

2. The sounder constructed with the tube 'r, made with the flaring opening, the gong-section 8, and the screws 1'. and j, all constructed and combined substantially in the manner and for the purpose herein set forth.

3. The combination of the hammer b, sliding block d, with binding-screw e, slotted plate f, standard g, with screw n, binding-screw p, and armature m, constructed substantially as described, and for the purpose set forth.

4. The combination of the sounder r 8, standard 22, hammer b, and armature m, substantially as described, and for the purpose herein set forth.

In testimony that I claim the foregoing as my own I affix my signature in presence of two witnesses.

DANIEL EDWARD SWEET.

Witnesses REUBEN Tnoms SWEET, CHARLES SING-LETON Swnn'r. 

